基于用户分簇的物理层增强安全多播算法

发布时间：2018-05-08 11:34

本文选题：物理层安全 + 多播　；参考：《工程科学与技术》2017年06期

【摘要】：物理层安全技术是无线网络技术中一项重要的关键技术。在大量多播用户和窃听用户共存的场景中,针对传统物理层安全技术中在波束赋形下增加人工噪声时不能很好地应用于多播传输的问题,提出了一种基于多播用户分簇策略下的物理层增强安全多播算法。首先,具有相近信道矢量的多播用户被分为同一个多播簇,不同的多播簇分配不同的子载波传输多播数据;其次,基于多播用户分簇策略的结果,提出了通过采用联合功率分配和波束赋形设计算法,最大化整个多播系统的安全多播速率;最后,为了降低算法的计算复杂度,提出了新的搜索算法处理联合功率分配和波束赋形设计算法。仿真结果显示:与传统安全多播算法相比,基于多播用户分簇策略的物理层增强安全多播算法不但能够获得更高的多播安全传输速率,而且其计算复杂度也大大低于采用遍历搜索的传统安全多播算法。
[Abstract]:Physical layer security technology is an important key technology in wireless network technology. In the scene where a large number of multicast users and eavesdropping users coexist, the traditional physical layer security technology can not be well applied to multicast transmission when the artificial noise is added under beamforming. A physical layer enhanced secure multicast algorithm based on multicast user clustering strategy is proposed. First, multicast users with similar channel vectors are divided into the same multicast cluster, different multicast clusters allocate different subcarriers to transmit multicast data; secondly, based on the results of multicast user clustering strategy, A joint power allocation and beamforming design algorithm is proposed to maximize the secure multicast rate of the whole multicast system. Finally, in order to reduce the computational complexity of the algorithm, A new search algorithm for joint power allocation and beamforming design is proposed. The simulation results show that compared with the traditional secure multicast algorithm, the physical layer enhanced secure multicast algorithm based on multicast user clustering strategy can not only achieve a higher multicast secure transmission rate. Moreover, its computational complexity is much lower than the traditional secure multicast algorithm using traversal search.
【作者单位】：中国刑事警察学院公安情报学系;
【基金】：辽宁省博士启动金资助项目(201601083) 辽宁省教育科学“十三五”规划2017年度项目资助(JG17DB537) 中国刑事警察学院院级项目资助国家自然科学基金资助项目(61172058)
【分类号】：TN918

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